Valve.



G. M. KEISER.

VALVE. APPLICATION FILED sE-PT.22,191o.

Patented July 23, 1912.

F W .4 G

GEORGE M. KEI ESER, F CA SS TOWNSHIP, SCHUYLKILL COUNTY, PENNSYLVANIA.

VALVE.

To all whom it may concern: i

Be it known that L GEORGE M. KnIsER, a

' citizen of the United States, residing at Cass township, in the county of Schuylkill and State of Pennsylvania, have invented. 'new and useful Improvements in Valves, of which the following is a specification.

This invention relates to valves, more particularly to the seats thereof; and has for its prime object to provide a valve seatwhich will not be subject to rapid corrosion and erosion from the passage of fluid containing more or less acid and sulfur in solu- -tion, and small particles of coal, dirt, slate,

culm and muck in suspension.

The valve seat. is designed mainly but not exclusively to be used in pumps of all kinds and especially in such as are employed in anthracite and bituminous coal mines for pumping water therefrom which is more or less charged with acid and gritty substances that rapidly destroy the operating face of the valve seats and consequently produce leaking.

The valve seat of the present invention is.

provided with an opening or openings through which liquid passes, said opening or openings being surrounded by rings, bands, or belts of non-corrodible substance which is also practically immune from the erosive action of destructive substances contained in the water. These rings, bands, or belts are made flush with the valve seat against which the valve contacts fluid tight; and notwithstanding the fact that the surface of the valve seat over which the water flows is being destructively acted uponby the foreign substance'containw'l in the passing water, the aforesaid rings being practically free or only slowly affected by said foreign substances the valve rei'aains tight and its life greatly prolonged. For a fuller and clearer understanding of the invention, attention is called to'the following detailed description and the panying drawings in which,

Figure 1 is a perspective view of the improved valve seat. Fig. 2, a plan view of the same. Fig. 3, a sectional view on the line 3 3 of Fig. 2, showing the valve in place, Fi .4, an enlarged sectional'view of detail dl the invention, and Figs. 5 and 6 are sectional views illustrating diagrammatically portions of two valve seats when subjected to water containing acid, or. sulfur, or small particles of coal, dirt, muck,

- Specification of Letters Patent.

Application filed September 22, 1910. Serial No. $3,210.

accom- Patented July 23, 1912.

- etc., Fig. 5 showing a valve-seat in common use without the non-corrodible wear resist-- ing inserts or packing rings.

In. the drawing, 10 indicates the body of the valve-seat, here shown as of cylindrical form with an outwardly projecting flange 11 at one end and smooth and flat at its opposite end against which the valve 12 is adapted to seat. The valve-seat body 10 is hollow, open at its flanged end, and provided with a perforated head 13 at its opposite end against the outer surface of winch the valve 12 seats as stated.

Through the axis of the'head 13 in this type of valve is made-a hole 14 in which the stem 15 of the valve 12 slides, while surrounding said hole are a plurality of other holes 16 for the escape of water when the valve is raised from its seat.

Formed inthe head 12 in any suitable manner between the openings 16 and the peripheral surface of the body 1.0 is an annular groove 17 wider at the bottom than at the top or of dove-tail shape, as clearly shown .in Fig. 4, into which is inserted a ring, band, or belt made of some non-corrodible wear resisting substance 18, such as lead, glass, wood, or other suitable material possessing the required properties to serve as a packing for the valve 12. A like annular groove 19 is made'in the head 13' ofthe valve-seah as shown inFigs. 1 and o. By this methodfof inserting the packing material in the'annular grooves, they are held tightly in place and will not work loose. y

In action, when the valve 12 opens or is opene'd water passes through the vali'e-seut body'l0 in the direction indicated by the arrows and out of the openings 16. If any of the foreign elements noted above be in the water, destructive action on the metal composing the body will be set up and in a short time the valve seating surface of the head 12 will lose its smoothness and become uneven, and if not supplied with the packings, leakage will result when the valve closes, which will rapidly increase by the said rings vresist such wearing action, see.

on the valve-seat body continues, but as Fig. 6, there will be no leakage when the valve closes, consequently the life of the.

valve-seat is extended. Thenormal wear on the packing rings b the valve presents a surface of graduall increasing width and maintains a. rfectly tight fit.

therefore the valveteioses'the force of. said closure is distributed-"over the entire surface of the valve seat. Packing rings which roject above the face of the valve seat are own, but in such construction thevalves on closing bear only on the packing rings,

i'vhich latter are-thus subjected to the hammering-action of the valve which tends to break, spread and otherwise deform the faces of said rings especially if made of a soft material, so that leakage past the valve will result. Now by making the acking rings flush with the faces of the va ve they cannot be deformed when the valvecloses because the latter contacts simultaneously with the much greater area of the valve seat. The flow of water being deflected outwardly by the valve, wear on the valve seat,

caused by destructive elements in the water is-not the same throughout its entire sur face, the greatest wear being between the openings 16 and the outer edge of the body .10. There will be less wear between the said openings and least wear on the surface surrounded by or within the circle of the openings. From this it is evident that notwithstanding the factthat the face of portion of the valve seat rema the 'valve seat may be. worn away on each sidearm packing ring between the openings andjthe outside of. the body 'to such an ex- "ii ant that the. packing ring at these points g rojects slightly above the valve seat, see

ig. 6, nevertheless the fact that the. major 'ns practically unworn, sudh projecting portions of the ring are not subjected to the hammer action of the valve and its bearing face thus reinains true.

I -It is. to be understood that the valve seat Attentionfis ca led to the factthat ini- I K lithe valve se atand pack-' .jng rings are in c6mmon=--"plane; when may have a single opening only and that the valve may be supported otherwise than on a stem passing through the valve seat,

as shown in the drawing, which form of construction is illustrative only ofone type of valve to which the present invention may be applied.

I claim p A valve seat comprising a hollow body provided with ahead at one end having an axial opening therethrough' for a valve stem, and a plurality of openings surrounding said axial opening for the passage of 'fluid, the'outer face of said head forming. of itself a fluid-tight seating surface for a valve, 9, ring of non-,corrodible wear resist-- ing material inserted in said face'between the fluid openings and the perimeter of thevalve seat, and-a second similar ring surroundin the valve stem opening and'within the uid openings the surfaces of said rings being flush with thfseating s rfa'ce.

In testimony whereof I hay fe hetyg'to set my hand in presence of twds'ubscrib'ng witnesses.

GEORGE M. KEISER.

copies at this patent may be obtained for five cents each, by addressing the Commissioner of fatents,

' Washington, 1). c." 

